Tried to zero .223 trainer today, with new 3-9 SWFA. Started off great, as a new .mil adopter sighting in was WAY easier. Shot 2 rounds at 50yds after boresighting, then used the reticle to measure. Made the adjustment, and was where I needed to be. (55gr PMC Bronze). Everything was shot off bags, prone. My goal was to get this dialed in and move into positional practice all off-season.


No math, no stupid "how many MOA is 8 inches at 50yds?" mental gymnastics. Measure, click, shoot. As expected, the 55gr was all over the place, so instead of chasing it around trying to fine tune a zero, I moved on. AAC 77gr OTM shot like garbage (2.5"-4" groups) but that's nothing new... before this rifle was cut/threaded it did the same. And similar to before the cut, 73gr ELD-M seems to shoot at 1"-1.25" which is good enough for me. Unfortunately, I accidentally grabbed the wrong range bag and only had 7rds of it. The 6th and 7th rd did start to trend up and left, but not terribly... enough to make me wonder what was going on.
I then tried some 75gr Horandy BLACK (HPBT) and had 3rds in a "not great but acceptable" group. Planning to shoot at least 10rds to get cone of fire, the next 3 grouped roughly the same, but high and left. What the hell!? It's 29⁰ out, so I didn't think I'd have mirage issues, but maybe?

To rule it out, I let the suppressor cool completely until cold to the touch. Fired another 3 and they came right back down to POA.

Let the suppressor fully cool again and shot the last 3 hoping to confirm that mirage was the problem...

Well damn; I guess mirage is for real, even in sub-freezing temps. I'll measure this group when I get home but very happy with the BLACK. I've read some posts about hunting success with them in the .223 thread, and while it seems to do okay, I'll likely train with it due to price and hunt with the ELD-M... at least until I get my hands on some 77gr TMK. If those shoot anywhere near the BLACK or ELDm, they'll get the nod for hunting.
I may give the AAC OTM another fair shot, as the poor groupings mimicked the BLACK's shift with mirage. Heck even the PMC Bronze might be better than I thought, chasing it around may have been mirage as well.


No math, no stupid "how many MOA is 8 inches at 50yds?" mental gymnastics. Measure, click, shoot. As expected, the 55gr was all over the place, so instead of chasing it around trying to fine tune a zero, I moved on. AAC 77gr OTM shot like garbage (2.5"-4" groups) but that's nothing new... before this rifle was cut/threaded it did the same. And similar to before the cut, 73gr ELD-M seems to shoot at 1"-1.25" which is good enough for me. Unfortunately, I accidentally grabbed the wrong range bag and only had 7rds of it. The 6th and 7th rd did start to trend up and left, but not terribly... enough to make me wonder what was going on.
I then tried some 75gr Horandy BLACK (HPBT) and had 3rds in a "not great but acceptable" group. Planning to shoot at least 10rds to get cone of fire, the next 3 grouped roughly the same, but high and left. What the hell!? It's 29⁰ out, so I didn't think I'd have mirage issues, but maybe?

To rule it out, I let the suppressor cool completely until cold to the touch. Fired another 3 and they came right back down to POA.

Let the suppressor fully cool again and shot the last 3 hoping to confirm that mirage was the problem...

Well damn; I guess mirage is for real, even in sub-freezing temps. I'll measure this group when I get home but very happy with the BLACK. I've read some posts about hunting success with them in the .223 thread, and while it seems to do okay, I'll likely train with it due to price and hunt with the ELD-M... at least until I get my hands on some 77gr TMK. If those shoot anywhere near the BLACK or ELDm, they'll get the nod for hunting.
I may give the AAC OTM another fair shot, as the poor groupings mimicked the BLACK's shift with mirage. Heck even the PMC Bronze might be better than I thought, chasing it around may have been mirage as well.





















